Six Feet of Suffering Starts With a Skipped Chain: Your Two-Week-Out Bike Checklist

Here's a stat nobody tracks but every ride marshal could confirm: the majority of DNFs at big gravel fondos aren't from cramping legs or blown-up pacing plans. They're mechanical. A snapped derailleur cable at mile 60. Brakes worn down to nothing by a seven-mile descent. A chain that finally gave up after months of silent neglect.

The good news? Almost all of it is preventable with an hour of your time and a bit of honesty about what your bike has been through. Do this two weeks out — not the Friday night before — so you have time to fix what you find.

The Five-Point Home Inspection

Grab a rag, a bike light, and your phone's camera (for zooming into suspicious spots). Work top to bottom.

1. The chain check. This is the big one. Chains wear gradually, and a stretched chain quietly destroys your cassette and chainrings along the way. Get a chain checker tool — they cost about twelve bucks — or use a ruler: twelve links should measure exactly twelve inches pin-to-pin. At 12 1/16", it's time for a new chain. At 12 1/8", you may be shopping for a cassette too. Either way, replacing it now beats a drivetrain failure on the Bozeman grade.

2. Brakes, honestly assessed. Rim brake riders: flip the bike and look at the pad. If the grooves are gone or the rubber is glazed and shiny, replace them. Disc brake riders: spin the wheel and look into the caliper. If the pad material is thinner than about a millimeter over the backing plate, it's done. Montana descents eat brake pads, and a spongy lever at 35 mph is not the moment to discover yours were marginal.

3. Tires and pressure. Pull each wheel and run a finger carefully around the inside of the tire, feeling for embedded glass, thorns, or a cut casing. Check the sidewalls for cracks or a bulging thread — gravel riding is hard on casings. If your tires have serious miles on them, replace before race day, not after. Write your planned race-day pressure on tape on the top tube so you're not guessing in a pre-dawn parking lot.

4. Cables, housing, and bolts. Shift through every gear while the bike is in a trainer or a friend holds the rear wheel. Hesitant or noisy shifting usually means cable stretch or gritty housing. Now grab a 4 and 5mm hex key and gently check the bolts on your stem, bars, seatpost clamp, and bottle cages. You're checking for snug, not torque-wrench tight — if in doubt, leave it for the shop.

5. The drivetrain deep clean. A filthy drivetrain wastes real watts and wears components twice as fast. Degrease the chain, wipe down the cassette and pulley wheels, relube with a wet lube if you expect dust and dry crossings, and wipe the excess. Your future self, three hours into the ride, will notice the difference.

What a Pro Tune-Up Actually Covers

If your inspection turns up anything beyond lube and tire pressure — or if your bike hasn't seen a stand in over a year — book a shop appointment now. Bozeman-area shops get slammed the week before any big event, and a two-week lead time is the difference between a relaxed wrench session and a panic order for overnight parts.

A proper tune-up typically includes: trued wheels (huge on rough gravel), full drivetrain adjustment and degreasing, brake adjustment or pad replacement, cable and housing replacement if needed, bottom bracket and headset play checks, and proper torque on every fastener. Ask the mechanic to specifically assess your bottom bracket and headset — creaks that seem minor on a 30-minute spin become maddening, and potentially serious, over 100 miles.

Expect to pay anywhere from $60 for a basic safety check to $150+ for a full overhaul with parts. If your budget only allows one splurge, make it a fresh chain and brake pads. Those are the two items that most often end rides.

Race Week: Do Nothing Stupid

Once the bike is dialed, resist the urge to keep fiddling. Don't try new pedals, a new saddle, or a different tire the week of the event. If you made changes, ride at least 30 miles on them before race day. Pack a small repair kit — spare tube (two for the 100 miler), tire lever, CO2 or mini pump, multitool, and a quick link matched to your chain — and practice using it at home once. Fixing a flat in your garage is a skill; fixing one on the shoulder of a Montana highway in the wind is a test.

Your bike has one job on event day: get you to the finish line without drama. Give it an hour of attention two weeks out, and it'll return the favor.